Air-cooling system for internal-combustion engines



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Patented Feb. 22, 1927.

EUGENE WINDBERGER, or PHILADELPHIA, r:ENNsYLvAN-IA.`

AIR-COOLING SYSTEM FOR- IN'LLERJIAL'-COMB-TSTION ENGINES.

Application filed June 1o,` 1926. serial 1am-114,877.

This invention relates to air cooling systems rfor internal combustion engines.

The objects are to providea. system for efficiently cooling an internal combustion engine, in which the flow of fresh cool air past the hot cylinders is practically unobstructed, and in which the heat radiating capacity of each cylinder is successively .increased inthe direction of the flow of the air, thereby effecting a practically uniform cooling of all cylinders.

These objects, and other advantageous ends which will be described hereinafter, I attain in the following manner, reference being 'had to the accompanying` drawings in which# Figure v1 is a central vertical section partly in full through an internall combustion engine embodying my invention,

Figure 2 a sectional plan taken substantially `on line 2-2 of Figure 1, certain of the parts being shown in full,

Figure 3 a sectional view taken on line y3--3 of Figure 1, and

Figure 4 asectional view taken on line 4-4 of Figure 1.

Referringto the drawings, 1 indicates an internal combustion engine, 2 its cylinders and 3 a series of horizontal fins radiating from the cylinders. The area of the fins oneach cylinder is successively increased from the front to the rear of the engine. The cylinders are enclosed by a duct 4 through which air passes. Deflectors 5 are preferably attached to the side walls 6 of the ductat points adjacent each cylinder to cause the air t0 travel partway between the cylinders as indicated by the arrows in Figure 2. The air enters duct 4 at the front end 7 and leaves the duct at the rear end 8, then flows downward at the opposite sides of the engine.

rlhe air is caused to pass through the duct by a plurality of fans 9, each of which is'rotatable in a bracket 10 and has a beveled gear 11 which meshes with a beveled gear 12 fixed with a shaft 13 rotatable in a bearing 14, on bracket 10, and having a beveled gear 15 which meshes with one side of a master beveled gear 16 provided with teeth on both sides. The other side of the master gear meshes with a beveled gear 17 fixed with a shaft l'rotatable in a bearing 19, on bracket 10, and having a beveled gear 20 meshing with a beveled gear 21 fixed to a crank shaft 22 of the internal combustion engine. Movement is transmitted to y the fans from the crank sha-ft through the gears just described. Bracket 10 may be suitably mounted on the engine as indicated at 23. Access to the cylinders vmay be had through a door 24 suitably hinged to the duct at 25.

The air is drawn into the duct through a.

screen26 suitably mountedin front lof the eng-ine.

When the engine is ruiming, vmovement is imparted to each ofthe four fans 9 through the parts 10-21 as clearly seen from the drawing. Fresh cool anl is ldraw-n by the fans through screen 26 and is forced through duct 4 past the cylinders. The air as it passes the cylinders isv deflected partway Abvetween the cylinders by deflectors. The heat radiatedl by the fins of the firstcylinder and absorbed by the passing -air is sufficient to cool that cylinder.`V The yheatradiation Aof the fins of the second cylinder .is greater, due to the. increased area of its fins, and the air passing the second cylinder, although warmed slightly by the first cylinder, absorbs sufficient heat to cool the second cylinder. A similar action of cooling by heat absorption due to increased heat radiation, takes place at veach succeeding cylinder. It is thus seen that the air as it successively passes the cylinders, although it becomes warmer, absorbs suflicient heat from each cylinder, owing to the air coming in contact with an increasing heat radiating area of the fins, to keep all of the cylinders cool and atpractically uniform temperatures. The air leaving the last cylinder' passes downward at opposite sides of the engine, as indicated by the arrows in 'Figures 1 and 2.

By having a duct which is practically straight and causing the air as it passes through the duct to be deflected partway between the cylinders, a practically unobstructed iiow of air passes through the duct, thereby enabling a large amount of cool fresh air to pass through the duct to cool the cylinders. I have shown the means for forcing air through the duct as being of special form and mounted at the front of the engine, but it is to be understood that equivalent means may be mounted at the rear of the duct, such for example as on the fly wheel of the engine or suitably connected therewith.

Vhile I have described my invention as taking a particular form, it Will be understood that the various parts may be changed Without departing froml the spirit thereof, and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come Within the scopeof the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In combination With the cylinders of an internal combustion engine; horizontal fins of varying dimension on the cylinders; an air duct surrounding the cylinders, *and means for causing a flow of air through the duct.

2. In combination with the cylinders of an internal combustion engine; fins on the cylinders, the area of the iins of each cylinder being successively increased from the front to the rear of the engines; a duct surrounding the cylinders, and means for causing a flow of air through the duct from the front toward the rear thereof.

3. In combination with the cylinders of an internal combustion engine; horizontal fins of varying dimension on the cylinders; an air duct enclosing the cylinders; deflectors on the duct at the sides of each cylinder for deflecting air partway between the cylinders,

and means for causing a flow of air through the duct.

4. In combination with the cylinders of an internal combustion engine; horizontal fins on the cylinders; a duct enclosing the cylw inders; a bracket mounted in the duct; a plurality of fans mounted on the bracket; a master gear rotatable on the bracket; means operatively connecting the master gear with the fans, and means operatively connecting the master gear with the engine.

5. A system for keeping the cylinders of an engine at substantially the same temperzr ture including` fins on the cylinders, an air duct surrounding said cylinders, means for causing a flow of air thrcugh the duct, said iins varying in size that the radiation area thereof on each of the cylinders' causes a given quantity of air to progressively absorb the heat of each cylinder in passing from one cylinder to the other.

(i. A system for cooling the cylinders of an engine including fins on the cylinders, the fins on each of said cylinders diifering in dimension from the fins on the other of said cylinders, an air duct surrounding said cylinders, and means for causing a flow of air through the duct.

In testimony whereof I have signed my name to this specification.

EUGENE WINDBERGER; 

